When having a particularly bad day, one might want to get away where they hide away will not be disturbed. There they can contemplate life and the relative crappiness of the day. I propose taking large ornamental rocks like the ones found in public gardens (I live in Vermont, which is apparently just
a big rock with dirt, grass, trees, hippies, and smaller rocks on top of it), hollow out a person-sized tunnel underneath the rock so a particularly sullen individual can crawl underneath and sulk for a while. If the tunnel diameter were large enough you could curl up and think of happy place or just lie on your back and watch the clouds go by. A nice bonus would be a rain shower while you sulked.